DALLAS — Reinforced doors with keypad entries. Body scanners and pat-downs. Elaborate crew maneuvers when a pilot has to use the restroom. All those tactics are designed to keep dangerous people out of the cockpit. But what if the pilot is the problem?

To steal Malaysian Airlines Flight 370 out of midair would require a pilot who knew how to elude detection by both civilian and military radar. It would take a runway at least a mile long to land the wide-body jet, possibly in the dark, and a hangar big enough to hide it. All without being seen.
Improbable but not impossible, experts say.

DALLAS - Travelers take note: The economics of earning free airline flights are changing.
Delta Air Lines Inc. said last week that starting Jan. 1 it will reward passengers for the amount they spend on tickets, not the number of miles they fly.

FORT WORTH - American Airlines emerged from bankruptcy protection and US Airways culminated its long pursuit of a merger partner as the two completed their deal Monday to create the world's biggest airline.